Food Chain/Web Quiz

Which organisms in the food web compete for the same food source in this environment?

• Vultures and termites

• Hyenas and cheetahs

• Trees and elephants

• Fungi and dung beetles

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A partial marine food web is shown. Green crabs carry a parasitic worm that can infect organisms that prey on the crabs. Which organism is most likely to be infected by this parasite?

• Gulls

• Marsh periwinkles

• Barnacles

• Blue mussels

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Which statement describes an organism making direct use of an abiotic factor for survival?

• a deer drinks water

• a bee drinks nectar

• a bird consumes an insect

• a snake consumes a bird

Organisms dependent on which resource will have difficulty surviving in Area A because of competition from the tree?

• Oxygen

• Warmth

• Water

• Light

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A sharp decrease in the population of mice would increase the competition for grasshoppers between-

• foxes and rabbits

• foxes and birds

• rabbits and birds

• owls and birds

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Why will the size of the deer population most likely decrease in the next few years?

• The deer are competing for oxygen.

• The deer are competing for soil.

• The deer are competing for space.

• The deer are competing for sunlight.

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In the aquatic food web below, which two organisms have a predator-prey relationship? (Level 2)

• Shad and Sturgeons

• Sturgeons and Shad

• Striped bass and Blueback herring

• Amphipods and Rangia clams

Which situation causes an increase in competition? (Level 2)

• After a prosperous spring in a forest ecosystem, there is an abundance of resources.

• Due to an abundance of producers, there is an increase in food availability for a terrestrial ecosystem.

• Following a drought, there is a scarcity of resources in a desert ecosystem.

• A marine ecosystem off the coast of Australia has reached equilibrium.

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The Couch's spadefoot is adapted to a certain type of environment. Which of these resources is most likely scarce in this environment? (Level 4)

• Soil

• Sunlight

• Water

• Oxygen

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Which example describes a biotic factor in an ecosystem affecting another biotic factor? (Level 1)

• A volcanic eruption causes a new island to form in the ocean.

• Increased nitrogen levels in a pond cause algae populations to grow.

• Increased rainfall in a desert region causes an increase in the amount of plant life.

• The introduction of a new species of bat to a forest reduces the number of mosquitoes.

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